期刊文献+
共找到244篇文章
< 1 2 13 >
每页显示 20 50 100
从“俗真两分”到“真俗两行”——章太炎“齐物”哲学体系的演进和极成
1
作者 梅寒 《苏州科技大学学报(社会科学版)》 2024年第2期10-14,21,共6页
章太炎在1906—1916年构建了“齐物”哲学体系。他在主编《民报》时期写作《俱分进化论》《建立宗教论》等文章,建构了世俗世界与“真如”世界一分为二的“俗真两分”世界观。在《齐物论释初本》中,章太炎完善了以世界观为主要内容的哲... 章太炎在1906—1916年构建了“齐物”哲学体系。他在主编《民报》时期写作《俱分进化论》《建立宗教论》等文章,建构了世俗世界与“真如”世界一分为二的“俗真两分”世界观。在《齐物论释初本》中,章太炎完善了以世界观为主要内容的哲学体系,并在《齐物论释定本》中转向“真俗两行”的实践哲学,“真俗两行”意味着圣人要在了彻“真如”智慧的前提下度化众生。“真俗两行”是“俗真两分”的必然结果,圣人悟入“真如”须得度化众生才有价值;“俗真两分”到“真俗两行”的转变体现了章太炎的境遇,他用激烈的革命思想阐述“转俗成真”,后期用保存“国粹”等方法努力践行“回真向俗”。 展开更多
关键词 章太炎 “齐物”哲学体系 “俗 俗两行” 《齐物论释》
下载PDF
从魏晋时期字体发展看《兰亭序》真伪论辩
2
作者 陆锡兴 《励耘语言学刊》 2013年第1期80-94,共15页
《兰亭序》真伪论辩的本质是汉字形体史上的学术问题。从20世纪60年代开始的论辩持续了半个多世纪,波及文献、书法、考古等学界,独唯缺少文字学界的加入,无疑大大影响了讨论的学术价值。本文指出论辩的起因,分析隶书、隶意的差别,... 《兰亭序》真伪论辩的本质是汉字形体史上的学术问题。从20世纪60年代开始的论辩持续了半个多世纪,波及文献、书法、考古等学界,独唯缺少文字学界的加入,无疑大大影响了讨论的学术价值。本文指出论辩的起因,分析隶书、隶意的差别,列举20世纪初以来的有关重大考古发现,依据客观事实论证三国吴到东晋的字体、书体演变,证明东晋时代出现王羲之《兰亭序》字体是可能的。 展开更多
关键词 王羲之 兰亭序 隶书
下载PDF
动态系统模糊马尔可夫建模方法研究 被引量:2
3
作者 钱峰 邓方林 汪立新 《航天控制》 CSCD 北大核心 2001年第3期66-70,共5页
着重讨论基于模糊马尔可夫模型动态系统建模方法 ,研究的问题是用模糊马尔可夫模型 ,根据系统实际输入—输出 ,获得线性和非线性随机动态系统非参数建模的新方法 ,最后 。
关键词 随机动态系统 模型设计 模糊马尔可夫模型 系统辨识 分真 马尔可夫链 模糊系统
下载PDF
Reanalysis of the phylogenetic relationships of the Pentatomomorpha(Hemiptera: Heteroptera) based on ribosomal, Hox and mitochondrial genes 被引量:1
4
作者 李敏 王艳会 +4 位作者 谢强 田晓轩 李腾 张虎芳 卜文俊 《Entomotaxonomia》 CSCD 2016年第2期81-91,共11页
Pentatomomorpha is one of the most biodiverse infraorders among the true bugs(Hemiptera: Heteroptera). Phylogenetic relationships among the superfamilies within this infraorder have been uncertain, especially for t... Pentatomomorpha is one of the most biodiverse infraorders among the true bugs(Hemiptera: Heteroptera). Phylogenetic relationships among the superfamilies within this infraorder have been uncertain, especially for the Eutrichophora. The previous studies were based on morphological characters, or just mitochondrial or nuclear genes, or only partial 18 S rDNA and COI. In this study, we used maximum likelihood(ML) and Bayesian inference(BI) based on massive molecular datasets(18S rDNA, 28 S rDNA, Hox and mitochondrial genes totaling 21 loci and 12,538 characters) to infer a robust phylogeny for this terrestrial group. Results strongly support the monophyly of all superfamilies; the superfamily status of Aradoidea and the following relationships:(Aradoidea +(Pentatomoidea +(Coreoidea +(Lygaeoidea + Pyrrhocoroidea)))) in Pentatomomorpha, and(Coreoidea +(Lygaeoidea + Pyrrhocoroidea)) in Eutrichophora. Our results suggest that sampling greater numbers of genes is an effective tool for resolving phylogenetic problems. 展开更多
关键词 taxonomy Eutrichophora molecular phylogenetics molecular datasets
下载PDF
Study on Screening of Fungi with High-resistance against Chromium and on Related Characteristics 被引量:4
5
作者 赖洁玲 唐晓燕 +3 位作者 钟礼松 林谦 吴弦华 韦明肯 《Agricultural Science & Technology》 CAS 2011年第12期1765-1768,共4页
[Objective] The aim was to separate chromium-resistant microorganism from soil contaminated by chromium.[Method] Separation and purification technique was used as follows:different concentrations of Cr^6+ were added... [Objective] The aim was to separate chromium-resistant microorganism from soil contaminated by chromium.[Method] Separation and purification technique was used as follows:different concentrations of Cr^6+ were added into medium,and chromium-resistant fungi were screened after separations and domestications.The selected fungi were under preliminary identification according to its morphological and colony characteristics.Then,related biological characteristics were studied,including measurement of growth curve,growing effects by temperature,pH value and osmotic pressure.[Result] The Cr(VI) with concentration of 1 000 mg/L was separated and selected from soils in ten different places contaminated seriously by heavy metal in adjacent region of Yulin City.Considering its morphological and colony characteristics,it was preliminarily identified as saccharomycetes,which can well grow within 15-37 ℃,and whose most suitable temperature was 28℃.Bacterial strain can grow well with pH of 4-10,and the optimum pH was 7.2;besides,it can grow well with NaCl concentration of 0.5%-5.0%.Through the experiment,the bacteria was found with resistance not only to chromium,but also to heavy metals such as Pb+Cu,Cu+Fe,Pb+Fe,and Pb+Cu+Fe.[Conclusion] The fungi selected from the experiment were of good adaptability to natural environment,and it also had resistance to other heavy metals. 展开更多
关键词 Bcteria with resistance to Cr(Ⅵ) Separation and selection Biological characteristics
下载PDF
Application of single neuron adaptive PID controller during the process of timber drying 被引量:4
6
作者 张冬妍 刘亚秋 曹军 《Journal of Forestry Research》 SCIE CAS CSCD 2003年第3期244-248,共5页
The paper presents a method of using single neuron adaptive PID control for adjusting system or servo system to implement timber drying process control, which combines the thought of parameter adaptive PID control and... The paper presents a method of using single neuron adaptive PID control for adjusting system or servo system to implement timber drying process control, which combines the thought of parameter adaptive PID control and the character of neural network on exactly describing nonlinear and uncertainty dynamic process organically. The method implements functions of adaptive and self-learning by adjusting weighting parameters. Adaptive neural network can make some output trail given hoping value to decouple in static state. The simulation result indicates the validity, veracity and robustness of the method used in the timber drying process 展开更多
关键词 Process control Timber drying Single neuron Adaptive control PID control
下载PDF
Elimination of phosphorus vaporizing from molten silicon at finite reduced pressure 被引量:5
7
作者 郑淞生 Jafar SAFARIAN +3 位作者 Seongho SEOK Sungwook KIM Merete TANGSTAD 罗学涛 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第3期697-702,共6页
Elimination of phosphorus vaporizing from silicon was investigated. Si-P alloy made from electronic grade silicon was used. All the samples were analyzed by GD-MS. Theory calculation determines that phosphorus evapora... Elimination of phosphorus vaporizing from silicon was investigated. Si-P alloy made from electronic grade silicon was used. All the samples were analyzed by GD-MS. Theory calculation determines that phosphorus evaporates from molten silicon as gas species P and P2 at a finite reduced pressure. The experimental results show that phosphorus mass fraction can be decreased from 0.046% (460ppmw) to around 0.001% (10ppmw) under the condition of temperature 1 873 K, chamber pressure 0.6-0.8 Pa, holding time 1 h. Both experimental data and calculation results agree that at high phosphorus concentration, phosphorus removal is quite dependent on high chamber pressure while it becomes independent on low chamber pressure. The reason is that phosphorus evaporates from molten silicon as gas species P2 at a relatively high phosphorus concentration, while gas species P will be dominated in its vapour at low phosphorus content. 展开更多
关键词 phosphorus concentration molten silicon equilibrium partial pressure TEMPERATURE chamber pressure
下载PDF
Method of Testing of Dynamic Forces on Digital Jet Elements 被引量:3
8
作者 莫波 杨彩霞 《Journal of Beijing Institute of Technology》 EI CAS 2002年第4期393-396,共4页
Method of testing for dynamic output forces from jet elements is studied, the handwidth is large in testing with this method. By establishing a model of the test system and simulating it, principles of how inherent fe... Method of testing for dynamic output forces from jet elements is studied, the handwidth is large in testing with this method. By establishing a model of the test system and simulating it, principles of how inherent features of the test system affect the dynamic force test are found out. Thus a theoretical foundation is given for the design and error modification to the actual test system. 展开更多
关键词 digital jet element dynamic force test MODELING error analysis
下载PDF
Isolation,Screening and Primary Identification of a Keratin-degrading Fungus 被引量:3
9
作者 柳焕章 刘建钗 周敬霄 《Agricultural Science & Technology》 CAS 2011年第2期253-255,共3页
[Objective] The paper was to provide new germplasm sources for efficient and economical degradation and utilization of animal keratin.[Method] The keratin-degrading fungus was isolated,screened and primarily identifie... [Objective] The paper was to provide new germplasm sources for efficient and economical degradation and utilization of animal keratin.[Method] The keratin-degrading fungus was isolated,screened and primarily identified by using the combination method of traditional isolation and screening,solid culture-medium degradation and animal test.[Result] A strain of non-pathogenic filamentous fungi with high degradation efficiency was obtained,which was preliminarily identified to be a species in Mucoraceae.[Conclusion] The discovery of the strain enriched the family members of keratin-degrading fungus,and provided new germplasm resources for degradation and utilization of animal keratin. 展开更多
关键词 Animal keratin Microorganism degradation Filamentous fungi Isolation and screening IDENTIFICATION
下载PDF
Chemical Constituents of One Species of Endophytic Fungus in Taxus chinensis 被引量:3
10
作者 张集慧 郭顺星 +1 位作者 杨峻山 肖培根 《Acta Botanica Sinica》 CSCD 2002年第10期1239-1242,共4页
Three compounds were obtained from the mycelia of an endophytic fungus Gliocladium sp. (designated as strain F) of Taxus chinensis (Pilg.) Rehd. growing in Fujian Province, China. Their structures were determined on t... Three compounds were obtained from the mycelia of an endophytic fungus Gliocladium sp. (designated as strain F) of Taxus chinensis (Pilg.) Rehd. growing in Fujian Province, China. Their structures were determined on the basis of spectral analysis. (20S,22S)-4a-homo-22-hydroxy-4-oxaergosta-7,24(28)-dien-3-one was a novel compound. 4,8,12,16-tetramethyl-1,5,9,13-tetraoxacyclohexadecane-2,6,10,14-tetraone was firstly isolated from the genus ofGliocladium and 6,9-epoxyergosta-7,22-dien-3-ol was firstly obtained from the strain F. 展开更多
关键词 Taxus chinensis (20S 22S)-4a-homo-22-hydroxy-4-oxaergosta-7 24 (28)-dien-3-one chemical constituent Gliocladium sp.
下载PDF
SIMULATION STUDY OF CHAOS IN DC-DC CONVERTER 被引量:1
11
作者 钟洁 于盛林 刘守生 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2003年第1期79-84,共6页
A DC DC buck converter c on trolled by naturally sampled, constant frequency PWM is considered. The existe nce of chaotic solutions and the output performance of the system under differen t circuit parameters are s... A DC DC buck converter c on trolled by naturally sampled, constant frequency PWM is considered. The existe nce of chaotic solutions and the output performance of the system under differen t circuit parameters are studied. The transforming pattern of system behavior fr om steady state to chaotic is discovered by the cascades of period doubling bi furcation and the cascades of periodic orbit in V I phase space. Accordingl y, it is validated that change of values of the circuit parameters may lead DC DC converter to chaotic motion. Performances of the output ripples fro m steady state to chaotic are analyzed in time and frequency domains respective ly. Some important conclusions are helpful for opt imization design of DC DC converter. 展开更多
关键词 DC DC buck converter bifurcation and chaos optimization des ign
下载PDF
关于Grünwald算子的多元推广 被引量:6
12
作者 林路 《浙江大学学报(理学版)》 CAS CSCD 2002年第1期8-11,共4页
考虑 R2 中三角域和多边形域上的 Grünwald插值算子及其一种基于非负凸组合的有理变形 ,证明了两种插值的存在性和唯一性 ,给出了相应的逼近估计 ,且最后的逼近估计是精确的 ,从而给出了Grünwald算子非乘积型多元推广不分片... 考虑 R2 中三角域和多边形域上的 Grünwald插值算子及其一种基于非负凸组合的有理变形 ,证明了两种插值的存在性和唯一性 ,给出了相应的逼近估计 ,且最后的逼近估计是精确的 ,从而给出了Grünwald算子非乘积型多元推广不分片和分片的两个范例。 展开更多
关键词 三角网点 三角剖 逼近估计 Gruenwald算子 正插值算子 Gruenwald插值 非乘积型多元推广
下载PDF
Simulation Study of the Workspace of the Parallel Machine Tool 被引量:1
13
作者 张建民 郝娟 王增平 《Journal of Beijing Institute of Technology》 EI CAS 2001年第2期191-196,共6页
A new three dimensional simulation method is introduced to study the workspace of a 6 PSS (P denotes a prismatic kinematic pair, S denotes a spherical kinematic pair) parallel machine tool. This algorithm adopts the... A new three dimensional simulation method is introduced to study the workspace of a 6 PSS (P denotes a prismatic kinematic pair, S denotes a spherical kinematic pair) parallel machine tool. This algorithm adopts the method of numerical analysis to investigate the boundary points in a series of sections which form the surface of the workspace. That is, to study such points that have the largest polar radius on a certain section in a system of polar coordinates according to conditions of constraint. The constraint conditions considered in the article include the maximum and minimum displacements of each dieblock, the maximum and minimum angles of oscillation in each hinge. By converting the constraint inequalities into constraint equations, the largest polar radius corresponding to every constraint condition can be evaluated and the minimum one is used to decide the boundary point. This algorithm greatly simplifies the computational process and can be used to analyze any section of the workspace. It provides a theoretical basis for the structural design of such a machine tool. 展开更多
关键词 PSS parallel machine tool WORKSPACE numerical analysis three-dimensions simulation
下载PDF
A FLEXIBLE SIMULATION TOOL FOR PERFORMANCE ANALYSIS
14
作者 舒炎泰 张平 +3 位作者 张燕 费亚中 贾明珠 金志刚 《Transactions of Tianjin University》 EI CAS 1996年第2期37+33-36,共5页
This paper presents RTSS simulation software with the capability for graphical model building and animation display. The RTSS simulation software consists of three separated parts: the simulation kernel, the model bui... This paper presents RTSS simulation software with the capability for graphical model building and animation display. The RTSS simulation software consists of three separated parts: the simulation kernel, the model building program and the result post processing program. The RTSS may run in the client/server mode. The main features of the RTSS software are more modular, more flexible and easier to upgrade. RTSS is built on object oriented technology, so it has more flexibility. The RTSS model of a system is an open queueing network. For modeling various data acquisition systems, communication networks and flexible manufacturing systems at different abstraction levels, RTSS has proven to be an extremely useful tool for performance analysis. 展开更多
关键词 SIMULATION performance analysis QUEUEING
下载PDF
基于模糊近似推理的Vague集双向近似推理方法
15
作者 石玉强 王鸿绪 《计算机工程与应用》 CSCD 北大核心 2008年第6期172-174,177,共4页
给出由有限论域上的Vague集导出的分拆真模糊向量和分拆非假模糊向量的定义。进而得到Vague集近似推理的真近似推理模型和非假近似推理模型。最后得到Vague集正向近似推理结论和逆向近似推理结论。实例表明这种Vague集双向近似推理方法... 给出由有限论域上的Vague集导出的分拆真模糊向量和分拆非假模糊向量的定义。进而得到Vague集近似推理的真近似推理模型和非假近似推理模型。最后得到Vague集正向近似推理结论和逆向近似推理结论。实例表明这种Vague集双向近似推理方法是可行的。 展开更多
关键词 模糊向量 拆非假模糊向量 近似推理模型 非假近似推理模型
下载PDF
Simulation Research on Structure Changing Control over the Follow Up System of the Smart Mine
16
作者 李杰 王琳 +1 位作者 孟嘉友 李世义 《Journal of Beijing Institute of Technology》 EI CAS 2000年第3期278-282,共5页
By analyzing the target's motion pattern, in terms of the requirement for the performance indexes of the follow up system, the structure changing control and time optimal theory is proposed. The system's co... By analyzing the target's motion pattern, in terms of the requirement for the performance indexes of the follow up system, the structure changing control and time optimal theory is proposed. The system's control scheme from three different aspects(the dynamic response simulation, compound control simulation and dynamic tracking simulation) is also studied. And all the results proved the feasibility of the synthetical utilization of the open loop control, speed decreased control and position closed loop control. 展开更多
关键词 structure changing control compound control CONTROLLER system analysis simulation
下载PDF
Distributed Computation Models for Data Fusion System Simulation
17
作者 张岩 曾涛 +1 位作者 龙腾 崔智社 《Journal of Beijing Institute of Technology》 EI CAS 2001年第3期291-297,共7页
An attempt has been made to develop a distributed software infrastructure model for onboard data fusion system simulation, which is also applied to netted radar systems, onboard distributed detection systems and advan... An attempt has been made to develop a distributed software infrastructure model for onboard data fusion system simulation, which is also applied to netted radar systems, onboard distributed detection systems and advanced C3I systems. Two architectures are provided and verified: one is based on pure TCP/IP protocol and C/S model, and implemented with Winsock, the other is based on CORBA (common object request broker architecture). The performance of data fusion simulation system, i.e. reliability, flexibility and scalability, is improved and enhanced by two models. The study of them makes valuable explore on incorporating the distributed computation concepts into radar system simulation techniques. 展开更多
关键词 radar system computer network data fusion SIMULATION distributed computation
下载PDF
New Algorithm for Image Target Recognition Based on Fractal Feature Fusion 被引量:2
18
作者 潘秀琴 侯朝桢 苏利敏 《Journal of Beijing Institute of Technology》 EI CAS 2002年第4期342-345,共4页
By combining fractal theory with D-S evidence theory, an algorithm based on the fusion of multi-fractal features is presented. Fractal features are extracted, and basic probability assignment function is designed. Com... By combining fractal theory with D-S evidence theory, an algorithm based on the fusion of multi-fractal features is presented. Fractal features are extracted, and basic probability assignment function is designed. Comparison and simulation are performed on the new algorithm, the old algorithm based on single feature and the algorithm based on neural network. Results of the comparison and simulation illustrate that the new algorithm is feasible and valid. 展开更多
关键词 FRACTAL feature fusion target recognition
下载PDF
Separation and Purification of Antioxidant Endophytic Fungi from Stevia Leaves
19
作者 王玉兵 郝再彬 +1 位作者 李海云 陈志良 《Agricultural Science & Technology》 CAS 2012年第1期123-126,142,共5页
[Objective] The aim was to separate and purify antioxidant endophytic fun- gi from Stevia leaves. [Method] Stevia leaves were used as materials for endophytic fungi screening and purification. Then, liquid culture was... [Objective] The aim was to separate and purify antioxidant endophytic fun- gi from Stevia leaves. [Method] Stevia leaves were used as materials for endophytic fungi screening and purification. Then, liquid culture was conducted to test fermented supernatant abilities of antioxidant, DPPH free radical clearing and chemilumines- cence inhibition. [Result] Forty two endophytic fungi were separated from F01 to F42. F41 was proved to be the strongest in antioxidant aspect; F37 was the strongest in DPPH clearing; F02, F07, F20, F25, F37, and F416 stood out in a comprehensive comparison of the above aspects. Flow injection chemiluminescenct method was used to test the above six fermentation liquors, and the results showed that antioxidant abilities of the six were quite strong for all of chemiluminescence rates were over 70%. Through preliminary morphological identification, bacterial colony was found white or yellowy and only F02 was of dissepiment. [Conclusion] Fungi with high-antioxidation activities were separated, which paved the way for future research. 展开更多
关键词 Stievia rebaudiana Endophytic fungi Separation and purification ANTIOXIDANT
下载PDF
Motion simulation and experiment of a novel modular self-reconfigurable robot
20
作者 吴秋轩 曹广益 费燕琼 《Journal of Southeast University(English Edition)》 EI CAS 2006年第2期185-190,共6页
Based on the character of the modular self-reconfigurable (MSR) robot, a novel homogeneous and lattice MSR robot, M-Cubes, was designed. Each module unit of the robot has 12 freedoms and is composed of six rotary jo... Based on the character of the modular self-reconfigurable (MSR) robot, a novel homogeneous and lattice MSR robot, M-Cubes, was designed. Each module unit of the robot has 12 freedoms and is composed of six rotary joints and one cubic link. An attached/detached mechanism was designed on the rotary joints. A novel space transmitting system was placed on the inner portion of the cubic link. A motor separately transmitted torque to the six joints which were distributed equally on six surfaces of the cubic link. The example of a basic motion for the module was demonstrated. The result shows that the robot is concise and compact in structure, highly efficient in transmission, credible in connecting, and simple in controlling. At the same time, a simulator is developed to graphically design the system configuration, the reconfiguration process and the motion of cluster modules. The character of local action for the cellular automata (CA) is utilized. Each module is simplified as a cell. The transition rules of the CA are developed to combine with the genetic algorithm (GA) and applied to each module to accomplish distributed control. Simulation proves that the method is effective and feasible. 展开更多
关键词 modular self-reconfigurable robot structure design motion simulation distributed control
下载PDF
上一页 1 2 13 下一页 到第
使用帮助 返回顶部